The Oregon Wolfe Baley's (OWBs) are a tool for barley genetics research and instruction. The population of 94 doubled haploid lines was developed from the F₁ of a cross between Dr. R. Wolfe's dominant and recessive marker stocks. The phenotypes resulting from segregation and independent assortment of alleles at 13 easily-scored morphological loci are visually impressive. These morphological loci are now positioned on a comprehensive linkage map built with an array of molecular markers. Due to its high level of polymorphism and integration of molecular and morphological marker loci, the OWB population will be a useful mapping resource. At the same time, the population can be used as a plant genetics and breeding teaching tool. For example, the epistatic interaction between the hooded (K) and short awn (lk-2) loci does not allow mapping of the k locus based on phenotypic data. In individuals that are homozygous for the recessive allele of lk-2, the expression of the hooded phenotype is masked, resulting in the expression of a short-awned, rather than hooded, phenotype. With graphical genotype analysis, we predicted the K locus genotypes of short-awned individuals based on their genotypes for flanking DNA markers. The predicted genotypes were then confirmed by mapping a barley homeobox gene (hvknox3) believed to represent the hooded (K) locus. The hvknox3 locus mapped to BIN 4 of barley chromosome 4 (4H), the map position of the K locus. Please visit our website: http://www.css.orst.edu/barley/WOLFEBAR/WOLFNEW.HTM.